Remove the wheel, then the 8- bolts holding the cover on, once they are out you can remove the driving shaft it will come out with the cover, once you have it out you have to press the bearing off the driving shaft which will allow it to come off, you can then access the seals.Re-assembly is in reverse.You are going to need a seal, gasket, possible bearing, and I would replace the half moon washers( that's what holds that driving shaft in,they are cheap .
We are always around to help you with advise, however you must have a parts book so when we do talk ,you will be able to see what we are trying to tell you.
If you do not have the parts books we have them also
Tommy
Affordable Tractor Sales
“Your Jinma Parts Superstore”
http://www.affordabletractorsalesco.com